/oauth/mfaEnroll. The user's username and password stand in for an access token.{
"ns_id": "1001@example.com",
"ns_id_type": "subscriber",
"mfa_key": "JBSWY3DPEHPK3PXP",
"mfa_vendor": "google",
"mfa_type": "authenticator",
"mfa_passcode": "123456",
"username": "1001@example.com",
"password": "{{user_password}}"
}